

Tuatara are the only surviving of a ancient reptillian order called Rhynchocephalia. the rest of the order was thriving around 200 million years ago. even though they look like lizards they are different having diverged around 250 million years ago the rest of the order died out around 60 million years ago. With the introduction of the Pacific rat the numbers of the tuatara die out fast with the only remaining ones being on islands